Screed plate for paver

Abstract

The utility model relates to an ironing plate for a paver and belongs to the field of pavers. According to the technical scheme, the device comprises a basic section ironing device, telescopic section ironing devices are arranged on the two sides of the basic section ironing device in a sliding mode respectively, a telescopic mechanism is arranged between the basic section ironing device and the telescopic section ironing devices, a connecting frame is arranged on the basic section ironing device, and a first guide hole is formed in the connecting frame; the telescopic mechanism comprises a first side end plate, a second side end plate and two layers of sliding columns arranged between the two side end plates, the number of each layer of sliding columns is at least two, the upper layer of sliding columns are arranged in the first guide holes in a sliding mode, the lower layer of sliding columns are connected with the telescopic section ironing device in a sliding mode, and the two layers of sliding columns move together during primary stretching; the two layers of sliding columns do not move in the second-stage stretching and retracting process, the stretching and retracting section ironing device moves in the length direction of the sliding columns to complete second-stage stretching and retracting, and the situation that due to the fact that two independent stretching and retracting mechanisms are adopted on one side, the torsional deformation resistance is weak, and then the requirement for heavy-load construction is difficult to meet is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pavers, in particular to an ironing board for a pavers. Background Art

[0002] The core working device of the paver, which lays the pavement material evenly and smoothly on the road surface according to the required width, thickness, and elevation, is also called the screed assembly or screed plate assembly. Based on the width extension method, it is divided into mechanically assembled and hydraulically retractable types. The screed plate described in this patent refers to a hydraulically retractable screed plate, or simply a retractable screed plate. It consists of several screed devices, generally including a base section screed device (or main unit screed device), a left retractable screed mechanism, a right retractable screed mechanism, a widening section screed device, a retractable mechanism, a height adjustment device, an elevation adjustment device, a material guide device, and a screed plate hydraulic system.

[0003] In recent years, several full-width retractable ironing screeds have appeared on the market, such as Figure 1 As shown, it includes a base section ironing device, left and right telescopic ironing mechanisms and left and right widening ironing mechanisms. When the left and right telescopic ironing mechanisms and the left and right widening ironing mechanisms are all extended to the maximum width, the total left and right width of the ironing plate is 2.5 to 3 times the width of the base section. When paving with a large width (less than 3 times the width of the base section), there is no need to assemble the ironing plate, which greatly reduces the workload of the disassembly and assembly machine and improves construction efficiency.

[0004] However, in the above-mentioned full-width telescopic ironing plate, since the single-stage telescopic rod has weak deformation resistance after long-distance extension and retraction, it is generally set as a graded telescopic slide tube. A first-level telescopic slide tube is set between the basic section ironing device and the left and right telescopic ironing mechanisms, and a second-level telescopic slide tube is set between the left and right telescopic ironing mechanisms and the left and right widening ironing mechanisms. When adopting the above-mentioned graded telescopic structure, there are still certain problems: each level of the telescopic mechanism is respectively provided with two sliding columns, which are staggered in upper and lower layers. The sliding column close to the telescopic mechanism of the basic section ironing device is subjected to greater force and has weak resistance to torsional deformation, which makes it difficult to meet the needs of heavy-load construction. Utility Model Content

[0005] The utility model aims at solving the problems in the prior art and provides an ironing board for a paver, which solves the problem that the prior art adopts a graded telescopic mechanism, which results in weak anti-torsion deformation capability and is difficult to meet the requirements of heavy-load construction.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A screed for a paving machine comprises a base section screed device, telescopic section screed devices are slidably arranged on both sides of the base section screed device, a telescopic mechanism is arranged between the base section screed device and the telescopic section screed device, a connecting frame is arranged on the base section screed device, a first guide hole is arranged on the connecting frame, the telescopic mechanism comprises a first side end plate away from the base section screed device, a second side end plate close to the base section screed device and two layers of sliding columns arranged between the two side end plates, each layer of sliding columns is provided with at least two, the upper sliding column is slidably arranged in the first guide hole, the lower sliding column is slidably connected to the telescopic section screed device, the telescopic mechanism is further provided with a first telescopic rod and a second telescopic rod, one end of the first telescopic rod is fixed on the base section screed device, and the other end is fixedly connected to the first side end plate, one end of the second telescopic rod is fixed on the second side end plate, and the other end of the second telescopic rod is connected to the telescopic section screed device. Through the telescopic mechanism and connecting frame, the two layers of sliding columns move together during the first-level telescopic expansion and contraction, and the two layers of sliding columns do not move during the second-level telescopic expansion and contraction. The telescopic section ironing device moves along the length direction of the sliding column to complete the second-level telescopic expansion and contraction, avoiding the situation where the use of two independent telescopic mechanisms on one side causes weak anti-torsional deformation ability and is difficult to meet the needs of large-load construction.

[0008] Preferably, the telescopic mechanism further comprises a guide frame having a second guide hole formed therein, the second guide hole being sleeved on the lower sliding column and slidably connected thereto; a vertical plate being provided at the lower end of the guide frame, the vertical plate being connected to the telescopic section ironing device; and the other end of the second telescopic rod being fixedly connected to the guide frame. The guide frame having a certain width can increase the contact area between the guide frame and the lower sliding column, thereby improving the resistance to torsional deformation.

[0009] Preferably, an adjustment device is provided between the guide frame and the telescopic section ironing device. The adjustment device can facilitate the staff to adjust the height difference and elevation angle of the telescopic section ironing device according to different road conditions.

[0010] Preferably, the adjustment device includes an upper support and a lower support hinged on the vertical plate, the lower support being fixedly connected to the telescopic section ironing device, the upper support and the lower support being always arranged parallel to each other, and the adjustment device also includes a hinge pin and an adjustment screw, the adjustment screw being threadedly connected to the upper support, the upper end of the adjustment screw being able to abut against the vertical plate. By providing the hinge pin and adjustment screw, when the elevation angle needs to be adjusted, the operator can turn the adjustment bolt to complete the elevation adjustment.

[0011] Preferably, the adjustment device further comprises a hydraulic motor, and a lifting screw is disposed between the upper support and the lower support, the lower end of the lifting screw being connected to the lower support, and the upper end of the lifting screw being threadedly connected to the upper support, and the hydraulic motor drives the lifting screw to rotate. By virtue of the provided lifting screw and the hydraulic motor, when height differential adjustment is performed, the hydraulic motor rotates to adjust the spacing between the upper support and the lower support, thereby completing the height differential adjustment of the telescopic section ironing device.

[0012] Preferably, two lifting screws are provided, a driving sprocket is provided on the hydraulic motor drive shaft, a driven sprocket is provided on one of the lifting screws, the driving sprocket and the driven sprocket are connected by a first chain, and a synchronous sprocket is provided on both lifting screws, and the two synchronous sprockets are connected by a second chain. The provision of two lifting screws can avoid the phenomenon of elevation angle changes during height adjustment due to insufficient force.

[0013] Preferably, a guide post is provided between the upper support and the lower support, wherein the lower end of the guide post is fixedly connected to the lower support and the upper end of the guide post is sleeved in the upper support. By providing the guide post, the stability between the upper support and the lower support during the lifting process can be further improved.

[0014] The advantages of the present invention are as follows: The telescopic mechanism and connecting frame allow the two sliding columns to move together during the first stage of telescoping. During the second stage of telescoping, the two sliding columns remain stationary, and the telescopic section ironing device moves along the length of the sliding columns to achieve the second stage of telescoping. This avoids the problem of using two independent telescopic mechanisms on one side, which results in weak torsional deformation resistance and difficulty meeting the requirements of heavy-load construction. The guide frame, with its width, increases the contact area between the guide frame and the lower sliding column, improving torsional deformation resistance. The adjustment device facilitates adjustment of the height difference and elevation angle of the telescopic section ironing device to suit different road conditions. The hinge pin and adjustment screw allow adjustment of the elevation angle by turning the adjustment bolt when necessary. The lifting screw and hydraulic motor allow the hydraulic motor to rotate during height adjustment, thereby adjusting the distance between the upper and lower supports and achieving height adjustment of the telescopic section ironing device. The two lifting screws prevent variations in elevation angle during height adjustment due to insufficient force. By providing the guide column, the stability between the upper support and the lower support during the lifting process can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the extension and retraction of the fully telescopic ironing board in the prior art of the present invention.

[0017] Figure 2 It is a structural diagram of an embodiment of a specific implementation of the utility model.

[0018] Figure 3 It is a partial structural diagram of an embodiment of the present utility model.

[0019] Figure 4 It is a structural diagram of the connection frame of an embodiment of the present utility model.

[0020] Figure 5 This is a structural diagram of a guide frame according to a specific embodiment of the present invention.

[0021] Figure 6 It is a partial structural diagram of the telescopic mechanism of a specific embodiment of the present utility model.

[0022] Figure 7 This is a structural diagram of the adjustment mechanism of a specific embodiment of the present utility model.

[0023] Figure 8 This is a structural cross-sectional view of the adjustment mechanism of an embodiment of the present utility model.

[0024] Description of main reference numerals

[0025] In the figure: 1. Basic section ironing device; 2. Telescopic section ironing device; 3. Telescopic mechanism; 4. Connecting frame; 5. First guide hole; 6. First side end plate; 7. Second side end plate; 8. Sliding column; 9. Second telescopic rod; 10. Guide frame; 11. Second guide hole; 12. Vertical plate; 13. Adjusting device; 14. Upper support; 15. Lower support; 16. Hinge pin shaft; 17. Adjusting screw; 18. Hydraulic motor; 19. Lifting screw; 20. Driving sprocket; 21. Driven sprocket; 22. First chain; 23. Synchronous sprocket; 24. Second chain; 25. Guide column. DETAILED DESCRIPTION

[0026] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0027] Example:

[0028] like Figure 2-Figure 8As shown, a screed for a paving machine includes a base section screed device 1, telescopic section screed devices 2 are slidably provided on both sides of the base section screed device 1, a telescopic mechanism 3 is provided between the base section screed device 1 and the telescopic section screed device 2, a connecting frame 4 is provided on the base section screed device 1, a first guide hole 5 is provided on the connecting frame 4, the telescopic mechanism 3 includes a first side end plate 6 away from the base section screed device 1, a second side end plate 7 close to the base section screed device 1, and two layers of sliding columns 8 provided between the two side end plates, each layer of sliding columns 8 is provided with at least two, the upper layer of sliding columns 8 is slidably provided in the first guide hole 5, and the lower layer of sliding columns 8 is slidably connected to the telescopic section screed device 2. The telescopic mechanism 3 is also provided with a first telescopic rod and a second telescopic rod 9. One end of the first telescopic rod is fixed on the base section ironing device 1, and the other end is fixedly connected to the first side end plate 6. One end of the second telescopic rod 9 is fixed on the second side end plate 7, and the other end of the second telescopic rod 9 is connected to the telescopic section ironing device 2. In this way, through the provided telescopic mechanism 3 and the connecting frame 4, the two layers of sliding columns 8 move together during the first-level telescopic extension, and the two layers of sliding columns 8 do not move during the second-level telescopic extension. The telescopic section ironing device 2 moves along the length direction of the sliding column 8 to complete the second-level telescopic extension, avoiding the situation where the use of two independent telescopic mechanisms 3 on one side causes weak anti-torsional deformation ability and is difficult to meet the needs of large-load construction.

[0029] In this embodiment, the telescopic mechanism 3 is further provided with a guide frame 10, and a second guide hole 11 is provided on the guide frame 10. The second guide hole 11 is sleeved on the lower sliding column 8 and is slidably connected to the lower sliding column 8. A vertical plate 12 is provided at the lower end of the guide frame 10, and the vertical plate 12 is connected to the telescopic section ironing device 2. The other end of the second telescopic rod 9 is fixedly connected to the guide frame 10. In this arrangement, the guide frame 10 is provided, and the guide frame 10 has a certain width, which can enhance the contact area between the guide frame 10 and the lower sliding column 8, thereby improving the ability to resist torsional deformation.

[0030] In this embodiment, an adjusting device 13 is further provided between the guide frame 10 and the telescopic section ironing device 2. The adjusting device 13 includes an upper support 14 and a lower support 15 hinged on the vertical plate 12. The lower support 15 is fixedly connected to the telescopic section ironing device 2. The upper support 14 and the lower support 15 are always arranged parallel to each other. The adjusting device 13 also includes a hinge pin shaft 16 and an adjusting screw 17. The adjusting screw 17 is threadedly connected to the upper support 14. The upper end of the adjusting screw 17 can abut against the vertical plate 12. The adjusting device 13 also includes a hydraulic motor 18. A lifting screw 19 is provided between the upper support 14 and the lower support 15. The lower end of the lifting screw 19 is in contact with the lower support 1 5, the upper end of the lifting screw 19 is threadedly connected to the upper support 14, and the hydraulic motor 18 drives the lifting screw 19 to rotate. In this arrangement, the adjustment device 13 is provided, which can facilitate the staff to adjust the height difference and elevation angle of the telescopic section ironing device 2 according to different road conditions. The hinge pin shaft 16 and the adjusting screw 17 are provided, and when the elevation angle needs to be adjusted, the staff can rotate the adjusting bolt to complete the elevation adjustment. Through the lifting screw 19 and the hydraulic motor 18, the hydraulic motor 18 rotates when the height difference is adjusted to complete the adjustment of the distance between the upper support 14 and the lower support 15, thereby completing the height difference adjustment of the telescopic section ironing device 2.

[0031] In this embodiment, two lifting screw rods 19 are provided, and a driving sprocket 20 is provided on the driving shaft of the hydraulic motor 18. A driven sprocket 21 is provided on one of the lifting screw rods 19, and the driving sprocket 20 and the driven sprocket 21 are connected by a first chain 22. A synchronous sprocket 23 is provided on both lifting screw rods 19, and the two synchronous sprockets 23 are connected by a second chain 24. In this way, the two lifting screw rods 19 are provided, which can avoid the phenomenon of elevation angle change during height difference adjustment due to insufficient force.

[0032] In this embodiment, a guide column 25 is further provided between the upper support 14 and the lower support 15. The lower end of the guide column 25 is fixedly connected to the lower support 15, and the upper end of the guide column 25 is sleeved in the upper support 14. In this way, the guide column 25 is provided, which can further improve the stability between the upper support 14 and the lower support 15 during the lifting process.

[0033] This solution can be used not only on full-width telescopic screeds, but also on conventional (symmetrical telescopic) telescopic screeds.

[0034] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screed plate for a paving machine, comprising a base section screed device (1), with telescopic section screed devices (2) slidably provided on both sides of the base section screed device (1), characterized in that: A telescopic mechanism (3) is provided between the basic section ironing device (1) and the telescopic section ironing device (2); a connecting frame (4) is provided on the basic section ironing device (1); a first guide hole (5) is provided on the connecting frame (4); the telescopic mechanism (3) comprises a first side end plate (6) away from the basic section ironing device (1), a second side end plate (7) close to the basic section ironing device (1), and two layers of sliding columns (8) provided between the two side end plates, each layer of sliding columns (8) being provided with at least Two, the upper sliding column (8) is slidably arranged in the first guide hole (5), the lower sliding column (8) is slidably connected to the telescopic section ironing device (2), the telescopic mechanism (3) is further provided with a first telescopic rod and a second telescopic rod (9), one end of the first telescopic rod is fixed on the base section ironing device (1), and the other end is fixedly connected to the first side end plate (6), one end of the second telescopic rod (9) is fixed on the second side end plate (7), and the other end of the second telescopic rod (9) is connected to the telescopic section ironing device (2).

2. The screed for a paver according to claim 1, characterized in that: The telescopic mechanism (3) is further provided with a guide frame (10), a second guide hole (11) is provided on the guide frame (10), the second guide hole (11) is sleeved on the lower sliding column (8) and is slidably connected to the lower sliding column (8), a vertical plate (12) is provided at the lower end of the guide frame (10), the vertical plate (12) is connected to the telescopic section ironing device (2), and the other end of the second telescopic rod (9) is fixedly connected to the guide frame (10).

3. The screed for a paver according to claim 2, characterized in that: An adjusting device (13) is also provided between the guide frame (10) and the telescopic section ironing device (2).

4. The screed for a paver according to claim 3, characterized in that: The adjusting device (13) includes an upper support (14) and a lower support (15) hinged on the vertical plate (12); the lower support (15) is fixedly connected to the telescopic section ironing device (2); the upper support (14) and the lower support (15) are always arranged parallel to each other; the adjusting device (13) also includes a hinge pin shaft (16) and an adjusting screw (17); the adjusting screw (17) is threadedly connected to the upper support (14); the upper end of the adjusting screw (17) can abut against the vertical plate (12).

5. The screed for a paver according to claim 4, characterized in that: The adjusting device (13) further comprises a hydraulic motor (18). A lifting screw rod (19) is provided between the upper support (14) and the lower support (15). The lower end of the lifting screw rod (19) is connected to the lower support (15), and the upper end of the lifting screw rod (19) is threadedly connected to the upper support (14). The hydraulic motor (18) drives the lifting screw rod (19) to rotate.

6. The screed for a paver according to claim 5, characterized in that: Two lifting screw rods (19) are provided, a driving sprocket (20) is provided on the driving shaft of the hydraulic motor (18), a driven sprocket (21) is provided on one of the lifting screw rods (19), the driving sprocket (20) and the driven sprocket (21) are connected by a first chain (22), and a synchronous sprocket (23) is provided on both lifting screw rods (19), and the two synchronous sprockets (23) are connected by a second chain (24).

7. The screed for a paver according to claim 5, characterized in that: A guide column (25) is further provided between the upper support (14) and the lower support (15). The lower end of the guide column (25) is fixedly connected to the lower support (15), and the upper end of the guide column (25) is sleeved in the upper support (14).

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